Perinatal mortality, i.e., the number of stillbirths (fetal deaths of 28 weeks or more of gestation) and the number of deaths within the first 0-6 days of life per 1000 births (live births and stillbirths)

The primary outcome is a comparison of area under the curve (AUC) for change in serum iron for each intervention adjusted for diurnal variation. The use of AUC will provide a single outcome for each participant.

The secondary outcome is a comparison of area under the curve (AUC) for change in serum folate for each intervention